CC BY 4.0 · SynOpen 2023; 07(03): 362-370
DOI: 10.1055/s-0042-1751479
paper

Multi-step Flow Synthesis of the Anthelmintic Drug Praziquantel

Manjinder Singh Phull
a   Department of Chemistry, School of Science, GITAM (Deemed to Be University), Hyderabad, 502329, Telangana, India
e   Cipla Limited Cipla House, Peninsula Business Park, Ganpatrao Kadam Marg, Lower Parel, Mumbai-400013, India
,
Surender Singh Jadav
c   Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
d   Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
,
Chander Singh Bohara
e   Cipla Limited Cipla House, Peninsula Business Park, Ganpatrao Kadam Marg, Lower Parel, Mumbai-400013, India
,
Rambabu Gundla
a   Department of Chemistry, School of Science, GITAM (Deemed to Be University), Hyderabad, 502329, Telangana, India
,
Prathama S Mainkar
b   Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
d   Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
› Institutsangaben
Authors are thankful to the Council of Scientific and Industrial Research (CSIR) and CSIR-Indian Institute of Chemical Technology for providing funding and research infrastructure facilities.


Abstract

Praziquantel (PZQ; Brand name: Biltricide) is categorized as an anthelminthic drug, and it is used for the treatment of Schistosomiasis and other parasitic infections. The World Health Organization (WHO) has classified it as one of the essential and emergency medicines needed across the globe. The price of PZQ formulated product depends on the associated method of preparation, along with cost of raw materials. A precise and reliable method for the preparation of PZQ using a flow-chemistry approach is described in this study using phenylethylamine as the starting material. The main objective of the present study is to identify a new economical route for the synthesis of PZQ that could decrease the production time drastically from days to minutes and be transferred to large-scale production. Simultaneously, the purity of the obtained intermediates in essential steps, as single or continuous process, determined by HPLC analysis were more than 90% pure. The continuous preparation process of PZQ in the current study was achieved in less time (ca. 3–4 h) than using conventional methods (ca. 3–4 days). Moreover, the required quantity of key intermediate dimethoxyethanamine is 40–50% less than in existing methods.

Supporting Information



Publikationsverlauf

Eingereicht: 01. April 2023

Angenommen nach Revision: 14. Juni 2023

Artikel online veröffentlicht:
14. August 2023

© 2023. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by/4.0/)

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